*{
  margin: 0;padding: 0;
}
img{
  width: 100%;
  height: 100%;
  display: block;
}
body,head{
  width: 100%;
  height: 100%;
}
#root{
  width: 100%;
  height: 100%;
}
.box{
  width: 100%;
  height: 100%;
  background: #ccc;
  position: absolute;
  left: 0;
  right: 0;
}
.box>.spin{
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate3d(-50%,-50%,0);
}
.logo{
  width:100%;
  height:50px;
  line-height: 50px;
  display:flex;
  border-bottom: 1px solid rgba(108, 108, 108,0.4);
}
.logo>img{
  width:40px;
  height: 40px;
  margin: 5px;
  margin-bottom: 0px;
}
.logo>span{
  font-size: 16px;
  color: #fff;
}